Definition
An ATC request used by a controller asking the pilot to report the aircraft's current altitude or flight level. The pilot responds by stating the altitude shown on the altimeter at that moment.
Plain English
The controller is asking, 'What altitude are you at right now?' The pilot reads the altimeter and tells them.
Context Anchor
Heard on the radio when a controller needs to confirm an aircraft’s height for traffic separation, radar identification, or a clearance check.
Derivation
“Say” comes from an old word meaning “to speak” or “to tell.” In aviation radio use, “say” means “state this information now.” “Altitude” comes from a Latin word meaning “high,” which fits its aviation meaning: height above a reference level.
Why Pilots Care
Accurate response prevents altitude errors that could compromise separation from other aircraft or terrain.
Intuition Check
Do not treat “Say altitude” as casual conversation. In radio use, it is a direct request to report your current altitude.
Example Sentence 1
Center called, 'November Three Two Alpha, say altitude,' and the pilot replied, 'November Three Two Alpha, level seven thousand five hundred.'
Example Sentence 2
During a handoff the new controller asked the pilot to say altitude before issuing a descent clearance.